Liquid heater



March 3, 1931. A. c. ENGELHART 1,795,253

LIQUID HEATER Filed Jan. 22, 1929 2 Sheets-Sheet 1 INVENTOR ATTORNEYMarch 3, 1931. A. c. ENGELHART LIQUID HEATER 22, 1929 2 Sheets-Sheet 2Filed Jan.

16,711? aZQjeZia/Z ATTORNEY Patented Mar. 3, 1931 i i UNITED STATESPATENT oiFiucE ALEXIS C. ENGELHAB'I', F MEMPHIS, TENNESSEE LIQUID HEATERApplication filed January 22, 1929. Serial No. 334,257.

This invention relates to a device for heatlower end 9 connected withthe top part of ing liquids,the general object of the invention thechamber 3 and its upper end is formed being to provide a casing havingelectrical with an extension which extends through heating meanstherein, with means whereby the nipple into the container.

5 the casing can be placed in communication Acarrier11,formed ofnon-conducting mawith the lower part of a container for the liqteriai,supports the electrical heating coil 12, uid, with means whereby theheating of the these coils being insulated from the coils 8 liquid inthe casing will cause the liquid to cirby the non-conducting material 13and the culate in the container through the casing conductors 14 connectthe ends of the coil 12 1" back into the container, so that the liquidin with the terminals 15 which are in turn conthe container will beheated. nected by the conductors 16 with the termi- Another object ofthe invention is to pronals 17 in a mercury tube 18. This tube is videan automatic switch for controlling the connected by a yoke 19 with astem 20 which circuit of the electrical heating means to preis connectedto the inner end of a thermo- 5 vent the liquid being heated to too higha static coil 21 placed in a casing 22, the outer degree. end of thecoil or strip 21 being connected This invention also consists in certainother with said casing. This casing is rotatably features ofconstruction and in the combinasupported against a wall of the casing 1,this tion and arrangement of the several parts, wall forming part of thechamber 3 so that 559 to be hereinafter full described illustrated theheat from the liquid passing through the in the accompanying c rawingsand specificalchamber 3 will act on the thermostatic device ly pointedout in the appended claims. and when this heat reaches a certain degree,

In describing the invention in detail. refthe strip 21 will so act uponthe stem 20 as to erence will be had to the accompanying drawcause thesame to turn and thus tilt the tube ings wherein like characters denotelike or and cause the mercury therein to leave the corresponding partsthroughout the several terminals 17 and thus break the circuit to theviews, and in which heating coil. lVhen the liquid cools, the

Figure 1 is a front view, partly broken thermostatic device will tiltthe tube in an away, showing the heater connected with a oppositedirection, thus causing the mercury 39 container. to again bridge theterminals 17 and again Figure 2 is a section on line 2-2 of Figclose thecircuit to the heating coil so that the ure 1. heating action will startup again.

Figure 3 is a section on line 3-3 of Fig- The heating of the liquid inthe coil 18 will ure 2. cause the liquid to pass upwardly through 35Figure 4 is a view partly in section of the the extension 10 into theupper part of the 55 mercury switch. container and other liquid willflow from the Figure 5 is a sectional view, showing a container throughthe port 7 into the chammodification. her 3 and then into the coil, sothat the liquid In these views, the numeral 1 indicates a in thecontainer will circulate through the casing which is divided by thepartition 2 heating device and thus the liquid in the into a smallchamber 3 and a large chamber container will be heated.

4. A tapered and screw threaded nipple 5 is A casing 28, having atransparent front- 24, formed on. the top of the casing and isadaptencloses the thermostatic device and the ed to be placed in a holein the bottom of a switch, and a small casing 25 encloses porcontainer,part of which is shown at 6. An tionsof the conductors 14 and theterminals opening 7 in the top wall of the casing places 15. the nipplein communication with the cham- In the modification shown in Figure 5,the her 3 so that liquid in the container will pass electrical coil 12'and its carrier 11 are enthrough said opening into said chamber. Aclosed in a casing 26 placed in the chamber 59 coil 8 is placed in thechamber 4 and has its 4 so that the liquid coil 8 is omitted as the 1 Iand passes through a slot in the casing 23 so that by moving thishandle, the casing 22 and the thermostatic member 21 can be ad-' justedto move the mercury switch to open and closed position.

From the foregoing it will be seen that I have provided a simple form ofheater for heating tne contents of thecontainer, with means whereby theheater can be easily and quickly attached to the container.

It is thought from the foregoing description that the advantages andnovel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claims.

What I claim is 1. A heater for heating liquid in a con tainercomprising a casing having a nipple thereon adapted to be placed in ahole in the container, a partition dividing the casing into twochambers, means for placing the first chamber in communication with thecontaine er, means for connecting the second chamber with the upper partof the container, means for causing the liquid to pass from the firstchamber through the second chamber into said connected with said secondcasing and with the switch whereby the switch willbe con-' trolled bythe heat imparted to the liquid passing through the casing.

2. A heater for heating liquid in a con tainer, comprising a casinghaving a nipple thereon adapted to be placed in a hole in the container,a partition dividing the casing into two chambers, means for placing thefirst chamber in communication with the container, means for connectingthe second chamber with the upper part of the container, means forcausing the liquid to pass from the first chamber through the second,chamber into said connection, a heating coil in the second chamber forheating the liquid therein, a circuit for the coil, a mercury switch inthe said circuit, a casing rotatably connected with one wall of thefirst casing, a thermostatic device connected with said'second casingand with the switch whereby the switch will be controlled by the heatimparted to the liquid passing through the casing and manually operatedmeans for adjusting the second cas ing to open and close the switch.

3. A heater for heating liquid in a container, comprising a casinghaving a nipple thereon adapted to be placed in a hole in the container,a partition dividing the casing into two chambers, means for placing thefirst chamber in communication with the container, means for connectingthe second chamber with the upper part of the container, means forcausing the liquid to pass from the first chamber through the secondchamber into said connection, a heating coil in the second chamber forheating the liquid therein, a circuit for the coil, a mercury switch inthe said circuit, a casing rotatably connected with one wall of thefirst casing, a thermostatic device connected with said second casingand with q the switch whereby the switch will be controlled by the heatimparted to the liquid passing through the casing, manually operatedmeans for adjusting the second casing to open and close the switch and ahousing having a transparent front for enclosing the second casing andthe switch. s

4. A heater for heating liquid in a container, comprising a casing, apartition therein dividing the same into two chambers, meansiorconnecting one chamber with the interior

